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2 NaHCO3(s) Na2CO3(s) + CO2(g) + H2O(g) Heating a 1.7184-g sample of impure NaHCO3 gives 0.196 g of CO2. What was the mass percent of NaHCO3 in the original 1.7184-g sample?
Describe the preparation of 1.5 liters of a 0.1 M acetate buffer, pH 5.0, starting from solid sodium acetate trihydrate
Draw and construct the open-chain model of glucose, How many chiral carbons are in the open-chain version of glucose?
The osmotic pressure of the solution is 1.21 atm at 27 °C. What is the molar mass of the solute?
What is the freezing point of a solution of 1.17 g of 1-naphthol, C10H8O, dissolved in 2.00 mL of benzene at 20°C? The density of benzene at 20°C is 0.876 g/mL. Kf for benzene is 5.12°C/m, and benzene's normal freezing point is 5.53°C.
Compute the volume of CO 2 and water vapour produced and the volume of oxygen remaining, when 20.0 dm 3 of propane reacts with 120.0 dm 3 of oxygen. All gas volumes are measured at the same temperature and pressure.
Consider a glass of 298 mL of water at 30°C. Calculate the mass of ice at -15°C that must be added to cool the water to 10°C after thermal equilibrium is achieved.
Determine the empirical and molecular formula and draw the Lewis structure for a compound
Calculate delta S0 for the following processes: a.) Heating 1 mol of benzene(liquid) from 298K to 353 K at 1 bar pressure, neglecting any T- dependence of Cp.
The vapor pressure for methanol and ethanol at 50 C is 406 and 222 Torr, respectively. Calculate the total vapor pressure of a mixture at 50 C that contains 0.2 mol of methanol and 0.1 mol of ethanol.
Use the modified form of the Clausius-Clapeyron equation to estimate the boiling point of water at 24.0 torr pressure
Write a net ionic equation for the reaction that occurs when aqueous solutions of acetic acid and potassium hydroxide are combined.
Using the molecular orbital theory, which one of the following is paramagnetic?
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